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  2. Duncan's new multiple range test - Wikipedia

    en.wikipedia.org/wiki/Duncan's_new_multiple_range...

    According to Duncan, one should adjust the protection levels for different p-mean comparisons according to the problem discussed. The example discussed by Duncan in his 1955 paper is of a comparison of many means (i.e. 100), when one is interested only in two-mean and three-mean comparisons, and general p-mean comparisons (deciding whether ...

  3. List of numerical analysis topics - Wikipedia

    en.wikipedia.org/wiki/List_of_numerical_analysis...

    Geometric programming — problems involving signomials or posynomials Signomial — similar to polynomials, but exponents need not be integers; Posynomial — a signomial with positive coefficients; Quadratically constrained quadratic program; Linear-fractional programming — objective is ratio of linear functions, constraints are linear

  4. Definite matrix - Wikipedia

    en.wikipedia.org/wiki/Definite_matrix

    In mathematics, a symmetric matrix with real entries is positive-definite if the real number is positive for every nonzero real column vector , where is the row vector transpose of . [1] More generally, a Hermitian matrix (that is, a complex matrix equal to its conjugate transpose) is positive-definite if the real number is positive for every nonzero complex column vector , where denotes the ...

  5. Principal ideal domain - Wikipedia

    en.wikipedia.org/wiki/Principal_ideal_domain

    []: the ring of all polynomials with integer coefficients. It is not principal because 2 , x {\displaystyle \langle 2,x\rangle } is an ideal that cannot be generated by a single polynomial. K [ x , y , … ] , {\displaystyle K[x,y,\ldots ],} the ring of polynomials in at least two variables over a ring K is not principal, since the ideal x , y ...

  6. Markov chain - Wikipedia

    en.wikipedia.org/wiki/Markov_chain

    For example, the transition probabilities from 5 to 4 and 5 to 6 are both 0.5, and all other transition probabilities from 5 are 0. These probabilities are independent of whether the system was previously in 4 or 6. A series of independent states (for example, a series of coin flips) satisfies the formal definition of a Markov chain.

  7. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    For example: 24 x 11 = 264 because 2 + 4 = 6 and the 6 is placed in between the 2 and the 4. Second example: 87 x 11 = 957 because 8 + 7 = 15 so the 5 goes in between the 8 and the 7 and the 1 is carried to the 8. So it is basically 857 + 100 = 957.